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L6228D Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części L6228D
Szczegółowy opis  DMOS DRIVER FOR BIPOLAR STEPPER MOTOR
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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L6228
September 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
s
OPERATING SUPPLY VOLTAGE FROM 8 TO 52V
s
2.8A OUTPUT PEAK CURRENT (1.4A RMS)
s
RDS(ON) 0.73Ω TYP. VALUE @ Tj = 25°C
s
OPERATING FREQUENCY UP TO 100KHz
s
NON DISSIPATIVE OVERCURRENT
PROTECTION
s
DUAL INDEPENDENT CONSTANT tOFF PWM
CURRENT CONTROLLERS
s
FAST/SLOW DECAY MODE SELECTION
s
FAST DECAY QUASI-SYNCHRONOUS
RECTIFICATION
s
DECODING LOGIC FOR STEPPER MOTOR
FULL AND HALF STEP DRIVE
s
CROSS CONDUCTION PROTECTION
s
THERMAL SHUTDOWN
s
UNDER VOLTAGE LOCKOUT
s
INTEGRATED FAST FREE WHEELING DIODES
TYPICAL APPLICATIONS
s
BIPOLAR STEPPER MOTOR
DESCRIPTION
The L6228 is a DMOS Fully Integrated Stepper Motor
Driver with non-dissipative Overcurrent Protection,
realized in MultiPower-BCD technology, which com-
bines isolated DMOS Power Transistors with CMOS
and bipolar circuits on the same chip. The device in-
cludes all the circuitry needed to drive a two-phase
bipolar stepper motor including: a dual DMOS Full
Bridge, the constant off time PWM Current Controller
that performs the chopping regulation and the Phase
Sequence Generator, that generates the stepping
sequence. Available
in PowerDIP24 (20+2+2),
PowerSO36 and SO24 (20+2+2) packages, the
L6228 features a non-dissipative overcurrent protec-
tion on the high side Power MOSFETs and thermal
shutdown.
BLOCK DIAGRAM
GATE
LOGIC
STEPPING
SEQUENCE
GENERATION
OVER
CURRENT
DETECTION
OVER
CURRENT
DETECTION
GATE
LOGIC
VCP
VBOOT
EN
CONTROL
CW/CCW
VREFA
VBOOT
5V
10V
VSA
VSB
OUT1A
OUT2A
OUT1B
OUT2B
SENSEA
CHARGE
PUMP
VOLTAGE
REGULATOR
ONE SHOT
MONOSTABLE
MASKING
TIME
THERMAL
PROTECTION
VBOOT
VBOOT
OCDB
OCDA
10V
10V
BRIDGE A
SENSE
COMPARATOR
BRIDGE B
D01IN1225
RCA
+
-
SENSEB
VREFB
RCB
HALF/FULL
CLOCK
RESET
PWM
ORDERING NUMBERS:
L6228N (PowerDIP24)
L6228PD (PowerSO36)
L6228D (SO24)
PowerDIP24
(20+2+2)
PowerSO36
SO24
(20+2+2)
DMOS DRIVER FOR BIPOLAR STEPPER MOTOR


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